{
  "manageEntity": {
    "action": "Save",
    "entityId": "1289380688",
    "entityType": "Track",
    "nonce": "0x2518a4ce0fbba40110223d3ddab7e7ff22460bb59ee44ec5beb9d38bb9f1d2bf",
    "signature": "0xda9dbe6114b05ea47a34c1118c00771479e0d3603969df294456d15d4b1f74793d4470e7aafa8e86b7fd7244f5f5152cda3e58f5ab2a06f9cf1e8e380c77c74f1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}