{
  "manageEntity": {
    "action": "Save",
    "entityId": "1175657068",
    "entityType": "Track",
    "nonce": "0x812f6d34d1125fa3bfbb38252b50709db8d627ff7b5b439cf150c185c4533dec",
    "signature": "0xa0d1e4e0c1b41cb16451fc334a6ffa1600ceeea7463404e7d1a500fc197c619815de8f45b0cc3c0d85354e8854003109d7c1ea16b438d6adacfd34a44d0ac88f1c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}