{
  "manageEntity": {
    "action": "Save",
    "entityId": "1393459673",
    "entityType": "Track",
    "nonce": "0x3f680e251a6f1b7670e74aef2171c48590f506d01ea601a8351f12c04c0432b0",
    "signature": "0xe169438cbc3f5ca792ceaaec9e6385bda1c34e6422fa7db30af26707827fd5991771634c059db334f415fef1efccadaaa5d4cb73099a9e5c5ee404aa1004e3271b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}