{
  "manageEntity": {
    "action": "Save",
    "entityId": "624062",
    "entityType": "Track",
    "nonce": "0xa1877e6471b981713938dc58298c0cc2bd9339a3df569dce2be02156bfee3734",
    "signature": "0x96a2fb79ca92231c8bfe7d95cfd36a8a86396d0f20257efc2ef134d05296979662ebb48547a0868732f45ce0c920c37410619ec77e263992df359b81dc4ad4451c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}