{
  "manageEntity": {
    "action": "Save",
    "entityId": "360654966",
    "entityType": "Track",
    "nonce": "0x47815e24a19bc5fa27ec88cec165754853fef09f07db55b40f79292269392eea",
    "signature": "0xa07dd7de2b63324aec5e264837c3aa734a8ff42cfdcfb3966b154878a766d2e2689211b40100983fc7988c1890922a37b5f183d973722e9e2472eec5646b0b421c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}