{
  "manageEntity": {
    "action": "Save",
    "entityId": "1144722301",
    "entityType": "Track",
    "nonce": "0xe27d983acd451765da7f041a7425f660313b98bf7e04d5b8ffa682c87e8f40a0",
    "signature": "0xc207b57072369c7aa32459bf8336ca5d8f87a2da8dcc1c26a26b93b58fa8fade53d7361fe2da1eb4001fdc2d26bafc68775a811ad282ddd0407e02ff5b87ddbe1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}