{
  "manageEntity": {
    "action": "Save",
    "entityId": "1996702916",
    "entityType": "Track",
    "nonce": "0xca40c02815d78fc665e4ad642ee5de6974374f76885e366a8373c823f0c53036",
    "signature": "0xebdd9d5a1ed953628d0e12eba7bde8a40c95393220c68050718b15c6da4128d55eb79dffb5d68797bf488ac9d6055c73b5f66655b546b6b0e23e9975881d7b7b1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}