Add management API v1

[yivo]

No description provided.

[antonror]

spec/models/withdraw_spec.rb:216
you have after_commit callback on cancel event in withdraw model, which reverts created withdraw to canceled and tries to unlock funds. created event locks no funds. a possible fix is to ensure aasm_state in callback method models/withdraw:152:

 def unlock_funds
    account.lock!
    account.unlock_funds sum, reason: Account::WITHDRAW_UNLOCK, ref: self unless aasm.from_state == :created
  end

[yivo]

[mod]

Normally payload is base 64 encoded, please double check the RFC

   payload
      The "payload" member MUST be present and contain the value
      BASE64URL(JWS Payload).

[yivo]

@mod It is handled by jwt-multisig gem. Check this https://github.com/rubykube/jwt-multisig/blob/master/lib/jwt-multisig.rb#L115