{
  "manageEntity": {
    "action": "Save",
    "entityId": "1021161",
    "entityType": "Track",
    "nonce": "0x678e3383960dee3a800eb2680460f08bcdb4a7058ef73bea9f5aaee6beac2a61",
    "signature": "0xa7a0ae96d68b3c0f69043975f1a58c61b2bb152cb9cabf8af92bd8fa9106ac3d3ef136114c9f1f0d5389f34d7f845903fbe616c23c2b75d875999e24928525971b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}