{
  "manageEntity": {
    "action": "Save",
    "entityId": "1822881273",
    "entityType": "Track",
    "nonce": "0xc757fe21d776664e4705de24b555e21c151816dfd6ba3c9c05de89771b762df4",
    "signature": "0xfcc464d335cc6cacab1fa8a6e52bdc63a469e30ba959ec573d6a591ec8dc43b204044ee311208a0ece5b4466a8511cf1e979409df7d90ac09029da50ebc217f61b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}