{
  "manageEntity": {
    "action": "Save",
    "entityId": "548013662",
    "entityType": "Track",
    "nonce": "0x97c9eb957107c78d30f6194a8044a098c6ac59c96201cdc6fda1ee63070f103a",
    "signature": "0xe3f05004407bf2d540ec975bbdbe9c97974e52d966321a78dbc68ec54cd64d856e544ca15198176cfce3218ec5eb8b5027bd4429aec2e389ac15a758c8dcb1a71b",
    "signer": "0xd85E4A094e4C057572A9D525C9737051A17ab609",
    "userId": "696716320"
  }
}