{
  "manageEntity": {
    "action": "Save",
    "entityId": "994274",
    "entityType": "Track",
    "nonce": "0xe9b63255ba93a5186a14d80b9b3f67b78f93cd8c1ebc930a78e7e678c238e086",
    "signature": "0x554f16f477aa0a49dedf49f94b19869a5a57f86164b1ba982c2c1a6ede47c34c7f132b3f3efab5a85b968c6d71a678529fcff4fc8fa6da09ac0520ae687be0a11c",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}