{
  "manageEntity": {
    "action": "Save",
    "entityId": "1814718417",
    "entityType": "Track",
    "nonce": "0xe06f5895b0edf181a20c6fc7b560dad126ed6106ee710b2748cb2c2d8ca6a28b",
    "signature": "0x166e52b8b07e2d1e94408d7825080a214be3a8d9b044e3f0aa63092b2edd7a857bfe3f4046aec1a6d18f4178c68b7ad1b09a0a4b1b9ddece51a5a69c007986921c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}