{
  "manageEntity": {
    "action": "Save",
    "entityId": "1615006829",
    "entityType": "Track",
    "nonce": "0x8423654e4c9e11604ab38a7c028ee3863b9a53a7d8971a3a57c6b808c0ef9c92",
    "signature": "0x4ee144cb16d3f7bcde9e3d2db0230b6e469924caa1bb7cae030c4450276a20985dc6fac47041a62d1afe394ad28d401932652d2ebc947f5eeba83144227df3711c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}