{
  "manageEntity": {
    "action": "Save",
    "entityId": "224499",
    "entityType": "Track",
    "nonce": "0x75896508b014f3a27c05e885b2fe7524153981d0aaa1aa18e60f577e1dc7862d",
    "signature": "0x5b334b18ae532812003ebe2135eb73c9ddd2e622fc93fdcb54d36cf631167e0161b161ba871806f8c9e6d4d6b84912cb9956aa36d9c8ddd252216fe9278c81051b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}