{
  "manageEntity": {
    "action": "Save",
    "entityId": "162830951",
    "entityType": "Track",
    "nonce": "0x2bc2d28c56a849b843f3c073df996c56498dc35aa8a92b0e161299e8608bc6b7",
    "signature": "0x1da2a9a6d6bc58a6139487a078be972b015a821ed29d90c3739ed461060e6dda73ffb05e75da58e013b8a9837bf20db6883ff8d229bcb77bad3429053ca2720f1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}