{
  "manageEntity": {
    "action": "Save",
    "entityId": "985783",
    "entityType": "Track",
    "nonce": "0x2e84c8e53f31631f9685cef3dc9bf964803ef302d254b5774cddb37d6ce81666",
    "signature": "0x2b0043bb91037d1980dbc356f6a2eaa53180c9dd18a166e6a072a26eb2076aa849bff723abae3260af69c1a92333d9dad3e3f30f087b6a5d384083ef8e8f81611b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}