{
  "manageEntity": {
    "action": "Save",
    "entityId": "786898209",
    "entityType": "Track",
    "nonce": "0x772fa642701a2b1c207348cdb9b90e965d7e6d87357f817c584e9f762949db52",
    "signature": "0xb9b022bbe6163d12aae061d7f573aea5f8497e8b19c91752875c0f302b1986a8302030c87c342dd74d71c6f9ec860d574514fe9bb2495d00954546156f5023e31b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}