{
  "manageEntity": {
    "action": "Save",
    "entityId": "1012962698",
    "entityType": "Track",
    "nonce": "0xb9ce5c29c4fc3a400646f10acb0f0ce848a3643f21d269885af3c3c61441dc0b",
    "signature": "0xe10997fa9f5a601d67be3ec32ed05ec174bf9c3e6c94cdc5c04f7569bb64df404cdc79b2f1998f0802e54e296c2b9860c9a813375a6ac921acf515a537f7415f1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}