{
  "manageEntity": {
    "action": "Save",
    "entityId": "1027918",
    "entityType": "Track",
    "nonce": "0x36b19730b32587dfe705aea49b90e78d3c7d8f632310722d432eb65f3e7ea8d5",
    "signature": "0x0548bb19111fd12e4bba1277fe6cecf64dfa37fe362ea2e6132edde3c58a6db6250e25e3946ea8d61bddb1f1d28eb67342b8c6c3b2ded8d92f1cff4ac40905661c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}