{
  "manageEntity": {
    "action": "Save",
    "entityId": "898169422",
    "entityType": "Track",
    "nonce": "0x8646da51b459639aec95695075e61c06bf26342a43dbb47932ba17fd6612bcc6",
    "signature": "0xf9306f01fc5612aa593d23700e52844ce0f3d42072c12e7eec8b04b6d30980922f9e726d74364848e7410bbff0635326a68add5139465c57aecdb03a668670941b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}