{
  "manageEntity": {
    "action": "Save",
    "entityId": "968916909",
    "entityType": "Track",
    "nonce": "0xa7facf3538cb707da7e58f5f92dbe8b6f183ffce30f2d8443f3aa90027fd94a6",
    "signature": "0x8208c9f31fdb511a7cfa8320d04d5979b2dce4e33bfc03f97c3f32842fa2635c52275a79877549162df040566f2fc6b050d847984386e13a4ae30fe089c65d5e1b",
    "signer": "0x5A6DCd6E22135e4225594900c17114A7dAD01964",
    "userId": "580576096"
  }
}