{
  "manageEntity": {
    "action": "Save",
    "entityId": "586499871",
    "entityType": "Track",
    "nonce": "0xad2d90f89ab5ec4c0e037018bca5ad0fe25fabd3abef63019b704ef3001c86c5",
    "signature": "0x36b45f0b65a5170b522881621e89884a5776bc3cc2c54710c2d9134835a565785639ab723fe3517f702081905832b03a3bfb830323474fd9b9e09dc0345029ea1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}