{
  "manageEntity": {
    "action": "Save",
    "entityId": "569523",
    "entityType": "Track",
    "nonce": "0x97570a04df3e77adef9203c6b7ab6523856e89f36096a667dc51e631aef27ff3",
    "signature": "0xb638969607f086eaf6e31f3aa3d60ee16c135177c93f8e1397bee8cf4c03c6612cc7749d80e45b820df3ed6d68bfd2fe0b6623701720484abe91b45cddb44ccd1b",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}