{
  "manageEntity": {
    "action": "Save",
    "entityId": "1165156479",
    "entityType": "Track",
    "nonce": "0x3e23566f8ad5830262b8e9a66c020ac0f15f07f2fe5da7c3b10b05cb025b97e5",
    "signature": "0xb13d2294e3d76fba7b30731c77ea2d7b14be4d5347a373ab789800319503d242489249a8d46abd87b6f6fefa002175d4be9250f5c9c475573ede6bcfe8fda0c31c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}