{
  "manageEntity": {
    "action": "Save",
    "entityId": "1293399119",
    "entityType": "Track",
    "nonce": "0xd412fc3c21a25e08bfaeaac488bb6cb4dafa5e92c253df05d1fd948e1f4997eb",
    "signature": "0xff2a7c1f342cd0dcab07593b6344fb393f772ad28791d306d692664d5df83fdf6a12ac3f97261b02b5720805c885bb5a88a540d46a4523fc414f56e5d38041921c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}