{
  "manageEntity": {
    "action": "Save",
    "entityId": "1142787428",
    "entityType": "Track",
    "nonce": "0x3e8a79091bfba63cef59454126d8874c52a9efe634433fb88038f9f466b86168",
    "signature": "0xb309f5ba075ea9829ad47b3d8b9966afb1d757d6799e7633c48f473376f033194a1b77f4c4b10ff4b2b5f6e3fd545d4b84d5f3cca519f4fc381b0159a5b06ee51b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}