{
  "manageEntity": {
    "action": "Save",
    "entityId": "454762127",
    "entityType": "Track",
    "nonce": "0x64fe653f969371d6a53a2a41c3d02c9eb615e8edf0dbd51ee628a80d77c91b05",
    "signature": "0xffb661d7568bde48a852e57fc6a4ddf1eac1fc791b606774562b2328e9eb740c79de1826f1bf8b14565af084798760d32d58741eabd2125d2c04e636254b34aa1c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}