{
  "manageEntity": {
    "action": "Save",
    "entityId": "1895707945",
    "entityType": "Track",
    "nonce": "0x6f1d3db7ce8edd4e3832e6f55c214afa8752364078c048d7fc2b81643feba10f",
    "signature": "0x93d6f44d81e759d46479e1305e38cdbb2192e7cf956287cec6effb9c2a4bcafb15537c769aa6e9d7e275224a2e6a2b8de535bbbebbd52c0053f36ab23d8de7931b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}