{
  "manageEntity": {
    "action": "Save",
    "entityId": "1473381650",
    "entityType": "Track",
    "nonce": "0x52289cf79577875ead2b3f73c060eb67176ef4c1e607ba8ef138e638b05e2dfc",
    "signature": "0x22268937477331bd7656f6812e5e3875a782d11cc6e742231051caf2579ab3e652656e28caa8b672226299203c2996adce26cd910f42c7b8c909d16f353de9121c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}