{
  "manageEntity": {
    "action": "Save",
    "entityId": "2124864645",
    "entityType": "Track",
    "nonce": "0x328e220c1806b5950e7117bbdfbb8e317f11966815c4c90bf26edc26b72a4836",
    "signature": "0xe6b70839bdbd39b72b9827007012895395baa2ade5a6903b3a37c3718a241be07a823515514c217d623671ea8bd17cc313c1bc0114e9a08459f1aabf414cd0341b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}