{
  "manageEntity": {
    "action": "Save",
    "entityId": "137673088",
    "entityType": "Track",
    "nonce": "0xf74629e8c7907bf8088cef0f2d80b46af5ecd47730163a88f0f2cecce1dd4e4f",
    "signature": "0x0a0ca36fdc6885127e8ca8604df4f6363a1135fca7c553ed43d2937fc64fd4152b1ce3e4331e41dc2e30a2ccd88c443b247e4e8d23719c01e7534f510975417b1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}