{
  "manageEntity": {
    "action": "Save",
    "entityId": "1888073814",
    "entityType": "Track",
    "nonce": "0xaa2caf5fbc7571ea2438c0ea5ad95eaa5262dca7fced5ee1640c6196830c580b",
    "signature": "0x7bf497e35ae0e30e2534d208ee371a18ddf613e7f77ae5a68c89aabd5a3e6e7c552d9708564a9c81d9ac5c30fe4dbc5a75e4baf8e7b61a250dcd3b0d93092ae71b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}