{
  "manageEntity": {
    "action": "Save",
    "entityId": "1879308287",
    "entityType": "Track",
    "nonce": "0x9cc1b7b8b0fceaaf75dee29c255db5fc7fdcf4cc2b98be19a1435761420184b1",
    "signature": "0xf6df7168ed17a29e440b633314e75d128b61b882468b7911133666ee8d996ea92d69e6683f8764417137d90e4745d20880f02a60e14891fe46cd9939f509f3641c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}