{
  "manageEntity": {
    "action": "Save",
    "entityId": "262805142",
    "entityType": "Track",
    "nonce": "0x4ca9b7470d9652e8a8d4d997b973c052c27ebf20e1d7c3d9e343c8f91caca3d6",
    "signature": "0xad5038e2375a32a8ed173b2ba9cebd8bf706fb2050bc325532e382b31da8cd2755224c3fad369fcdb8f0f24f2706ede8649807a4629558866b4ae4ea1a82a77b1c",
    "signer": "0x2F6f1b51b748C6C876De5380d067266aF122eB2E",
    "userId": "146950133"
  }
}