{
  "manageEntity": {
    "action": "Save",
    "entityId": "2035538177",
    "entityType": "Track",
    "nonce": "0x1a702f0325f79c30e01fab2fb043c740fe8c4bd3f1e5e59542e675491592ea5d",
    "signature": "0xdf76fb33a54f4c3674c792de09a8cab86f785ff99c3e08074e07f37f187df6f906dcfe2dd4fe4983ecfd1d3388521311df343bc0bac4dfc5aab756da8bdbd06c1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}