{
  "manageEntity": {
    "action": "Save",
    "entityId": "1721106194",
    "entityType": "Track",
    "nonce": "0x8346ea0df911dead5d6cdb66b559049da58aa8ca947195c76e0559c065ddbbec",
    "signature": "0x2e2b988557eca68694985aad3fd862a799b22ca1ed8aac5636839c360afcfa4a5d74e3f506b62bf093bf3f59eab2dad3468ec80ccbaab27d355a8fe6fc41a4361c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}