{
  "manageEntity": {
    "action": "Save",
    "entityId": "710230098",
    "entityType": "Track",
    "nonce": "0x8b281c994bbf9ba73716bfa6a24cae68a412f6551969c48f987ad006eae044a2",
    "signature": "0x5a0d98d728464b1e724a8514932a9e62139870e2229a2250b17175cf6f241f910f65c4d41c6bc539b6ef34de14124a1ecff232d783ef7fa5c4e657c6bb042e821c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}