{
  "manageEntity": {
    "action": "Save",
    "entityId": "508998",
    "entityType": "Track",
    "nonce": "0x080eb9a13320da1d5a36053eab655e95aa65ddd882700984b7efe3568b844a9d",
    "signature": "0x27d21f82086c44f02a6361748ca539372a6652db34aa2aa63162344e742fdc02257f8dfccf9863ddf1eb54b9b6ad9a82b49cae3a008d8a22836ae9c47cdecfa31b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}