{
  "manageEntity": {
    "action": "Save",
    "entityId": "1390402586",
    "entityType": "Track",
    "nonce": "0xd5b0a620db2234c24be42b6bc478f7011f305535ddbdff2cb1d1aa3c62072fc0",
    "signature": "0x9db3567c015c6999239de9ed5baa23fff0f33930918fbe45e325e18b186fe8a03442f5c53713b25d945592bba61923cf1e2c43924d3eabac5ab8c32d7ea97c991c",
    "signer": "0xBd23bdEE0e13E1F39337628dd9E0fE89A7797979",
    "userId": "381868494"
  }
}