{
  "manageEntity": {
    "action": "Save",
    "entityId": "1828175838",
    "entityType": "Track",
    "nonce": "0xc8001de688be5d95141631cd7948e5cc92971a0e4e22b97397c0e60a8cac8166",
    "signature": "0x671195c4f6c37e6f219095a094cb917a98e93cd5762634db007a9fa3143cefbb433d2721bda42c9a5c78bc61b27f3e8ac03501d673958aa399b4bd0eecd046761c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}