{
  "manageEntity": {
    "action": "Save",
    "entityId": "239643955",
    "entityType": "Track",
    "nonce": "0x78d59b674d99d9c9a007d419545124d0e7cd5322b9dc6e77943daa9c7dc15f46",
    "signature": "0xf4c18b3b7da8258151a8a61c0b048ff728128a4a88fe106a6bf13b974f7eb92b302bf765643b78b97980ca8cf0bb8eea396ca53a705609b9a484e0b02d3ed2871c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}