{
  "manageEntity": {
    "action": "Save",
    "entityId": "840434213",
    "entityType": "Track",
    "nonce": "0xd1366a1ecd8737097b4ee29d2ab90b11f99cedd15f8fccf54f8ee4c3472266f4",
    "signature": "0xa71778ea1a84b8c2b1cb2bf08f7e4b02fa5115489dfcd42b59855437e93cbc372ed7bd5146fc5f42f7700589d457dfd85f03234d20e32a8979bdc6853b456a9a1b",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}