{
  "manageEntity": {
    "action": "Save",
    "entityId": "129959",
    "entityType": "Track",
    "nonce": "0x874f1cd509211d777ed0bcee652aecd358efe25bd45e7470d6b1ddaf817a7872",
    "signature": "0x9eac6909a4b9a6d5f6ba76863ab22f0daf865213adae2d2c1e839b3ff745c87526f4531df0ad3119bbde95d402ef1937ff8ece8b59edf0e3b647374e5ab4fadf1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}