{
  "manageEntity": {
    "action": "Save",
    "entityId": "1133030618",
    "entityType": "Track",
    "nonce": "0x16676ef58cd302f416ddd03ea3772cfdd21e79009aad42e5f8c28727147e31ac",
    "signature": "0xbf93ebd6d8e35bc0443a54aeb475d98464f982dcad158d78d38fa61571b46bac359282b204eb1a66cf2276ee64feb4217812649095feab618c8c44a0815fae461b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}