{
  "manageEntity": {
    "action": "Save",
    "entityId": "1962580568",
    "entityType": "Track",
    "nonce": "0xf2b7f0dab5ea035c37ffc46ceaf71497c541f1ae685d2c6dab9220f9afbf7840",
    "signature": "0xd4ee02e3c0b860dd4b009a28cb29aebff6bd1c004a5adcf8d5dc4f0195284b23348b5d640991e0f7624a17474de19b15671c9becfe5da901aef58b8044ef51e51c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}