{
  "manageEntity": {
    "action": "Save",
    "entityId": "1497999873",
    "entityType": "Track",
    "nonce": "0x4a8dfc1a79025348f8a6b2b95a6340c3836b088f0491b1735a2f3f2815985c41",
    "signature": "0xf09a7779d12046e42a5a6c139146b8a9bee34988dce0210ab02351fa8ea6065d6bbe4477b0283b59a88c28722925e7c9fc5ae23416b62a4333ca3cd265d049f31b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}