{
  "manageEntity": {
    "action": "Save",
    "entityId": "1369234827",
    "entityType": "Track",
    "nonce": "0x4a29b3741486714cd7dca2374a32ea1ada7c4235ef2f02adc9acec22adde0c9d",
    "signature": "0x55f21dcf77deeb3359ff8af57971307d44ee1b1c86f6ddfcea76dec934e7b6e55eda14b931eab9f29c134ea8d7962a7dee45e1279108a5f026d49877da04cc141b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}