{
  "manageEntity": {
    "action": "Save",
    "entityId": "2103869911",
    "entityType": "Track",
    "nonce": "0x03c441399649f61da555c0448522ad52c7a34de4e75a6228b982d9b6edde6947",
    "signature": "0xd51058e23d56485700e03ca5a9c69e0b7ea8d9273a68977889eba91a715095ce159c2d5d3136f46bc14497ab279e18940008a976dd8bad9bdcd81cb4aa9009301b",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}