{
  "manageEntity": {
    "action": "Save",
    "entityId": "1000240337",
    "entityType": "Track",
    "nonce": "0xa3ccf931fa95963846346d1e4c509bdc9d7ec866bb7d229f00dca323b9c42bf6",
    "signature": "0xefcce991131e630a884aa5b9ab23c2a261e38ceb211822ec102253bf71b099c45394cdcda45de3b77fbe1080d954f1a4a13f9a2cc7b8f514240d2fecbee1c7ad1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}