{
  "manageEntity": {
    "action": "Save",
    "entityId": "214776",
    "entityType": "Track",
    "nonce": "0x9ac6faa314dcad881a2908f3181b857ad64030880abd482bf84f95ba74f85067",
    "signature": "0x125e07a9eeb4700b58c8d0df1477aaee7cf65c900bc30628d17e2e9eb5cfe9d66c5006e864e0eb6662b5b661a7ebe6a1fd7eb3ea7d1bc50fac681ca2e8e55d701c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}