{
  "manageEntity": {
    "action": "Save",
    "entityId": "1487009469",
    "entityType": "Track",
    "nonce": "0xa991c42b6fb27c99c949a67badd742bc905586c27b1c6dc5820ff1ef5eb55aca",
    "signature": "0x4cb3b624676e99ec6a312feafc540064f526c81f793d503617191b4003e742000d7cb26e3fb50a2c521b838b67116c01e3bca54c0a05e57917dd4b806ea3407e1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}