{
  "manageEntity": {
    "action": "Save",
    "entityId": "1950068525",
    "entityType": "Track",
    "nonce": "0xf93637fd3e56280562e79c9cece2538109cdee6412d11fc0c2345da499a25b3c",
    "signature": "0x5904e133297da84f81be73bb92543e8a564dfa3a081c6e8e509ae2106cfccb9f2ea74fc49f46393e9458e87682eb1d3667b584e6fe99fbf5a1311fa11d16ce691c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}