{
  "manageEntity": {
    "action": "Save",
    "entityId": "274934",
    "entityType": "Track",
    "nonce": "0x26cf6c938e40f361715690832574fd216f90adf36e740421e8176793c68432ac",
    "signature": "0x74d238fb8f86aaf7d6b79d52988b68ee8d4a8a92ab1bbef5a86448a5599eb7ee7be5e0883fcbe103ca6a44baf058315e81cb3402f23a62bc56ea09ffc2ceb5f11c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}