{
  "manageEntity": {
    "action": "Save",
    "entityId": "168738",
    "entityType": "Track",
    "nonce": "0xd565f980fba753a726e9f29b6167d53d0b61de4b404e581b3cdb1422c4aa1e66",
    "signature": "0x8f22b82cca8a67ed3c148b9f37e9e589e84f2ee8127c59bb400932e73f314a7149e015c53dbe9c15a947c2e94c230d5e9232dc745e6d9e96b1fc65c64c15a2451b",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}