{
  "manageEntity": {
    "action": "Save",
    "entityId": "1594256407",
    "entityType": "Track",
    "nonce": "0xea0cb0ddd8b1833b320559808287b8ac09be1b8a0fc019203be652afa6f49bda",
    "signature": "0x29e93eda8d009c58dc9e3a3121a17a0c73989bde391e45ef5cfd5c345a12a34c536eb07ccb55219d0c7372149e7ce13aff408dd91236c3b2f375a6b1a08f8e5a1b",
    "signer": "0x50Ae5c6e77f43cA1009EcC10DC8dA0498d717929",
    "userId": "341195"
  }
}