{
  "manageEntity": {
    "action": "Save",
    "entityId": "1861996989",
    "entityType": "Track",
    "nonce": "0x18abb23d8fcfd456fc4dd6de4ef87080530473ff1c44f015060bd08d78d36ef0",
    "signature": "0x509fec9ee8cadcb205edf03761dd854acff733c79c19ca7b2af57d416779cbc63f56e70e87e84632982baca1810093e3504af591c403328fac65baeaf7954aeb1b",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}