{
  "manageEntity": {
    "action": "Save",
    "entityId": "1775990497",
    "entityType": "Track",
    "nonce": "0x60def368d8c903245ab60b64c91cded1567123985967f57b34b285bd08d78fb8",
    "signature": "0xd9437428968ab786ef05dd0df160b2d297dbe8ed762e58f80d062e4d42146e6071318c00c49044a6dd6614f0b3d13d2c261ab53d2debadc83bfe82f8015a96411b",
    "signer": "0x0168976438910D2f5330323a0d0141Fb4Af95032",
    "userId": "317847"
  }
}