{
  "manageEntity": {
    "action": "Save",
    "entityId": "191691171",
    "entityType": "Track",
    "nonce": "0xce554d0e3e087f2e96ca8b53307a3a2ece9aaa32b0ed43ea711907e0f8baa607",
    "signature": "0x930a26d16ca3129fe415651543f791cf0a89b2bb64f2eba45121b9958e91bb6653b20cc2f193920a18fb04ee6cdbd24a7f31691af88ff64e7a533adfd8eb1cb51b",
    "signer": "0x0a5148A3f132E6696c1Cd3FDA8465fC5fF17d3D2",
    "userId": "803288761"
  }
}