{
  "manageEntity": {
    "action": "Save",
    "entityId": "1960597014",
    "entityType": "Track",
    "nonce": "0x470d5e8c2db5239680e71dac78b2d2b2ea70800d43af5291644917b0ed1bb693",
    "signature": "0xb2a54f1cb1974726dd8f6dab35fb4c21f2ba8c2279c8586003cc67bd9d17c93437705cb1183d5f1a770791143ddd754c20235ffd9e9f9553c538ffa35548f50a1c",
    "signer": "0xB2A34b43465721B690e6CbCfB42C0cdC30050183",
    "userId": "103086"
  }
}