{
  "manageEntity": {
    "action": "Save",
    "entityId": "222805366",
    "entityType": "Track",
    "nonce": "0xe7452b8a82a74d098a66b0ec998f8300b7b89874747053271bbe4b7cb07ceb3c",
    "signature": "0x56e7eb557113e683070f21b2ac15839ba6d2775a238351d060d2cbd7ab353cf504adf48e387ce4c801b566ce9f2ea984105be73954e7c621f96c8aa6e0b5341b1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}