{
  "manageEntity": {
    "action": "Save",
    "entityId": "85909090",
    "entityType": "Track",
    "nonce": "0x4379080d15d97ebc8b0dfa94cf3c9e5b6bf48d8f5d42a5d272c83d5811e7fc3a",
    "signature": "0x07c66ac9771e79ecae0a680a7f0e13fefd53d47ac47dc391eeafed607fc02aec19a22f239887af92bdb8cfc5dbe9f97f28b7d57d1c575dbc6f4a8388190e6dd81c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}