{
  "manageEntity": {
    "action": "Save",
    "entityId": "1499337064",
    "entityType": "Track",
    "nonce": "0xfc82816a8ec4cbcab2e2f35538ef39078c9f6158659335dd1be7856870f844fa",
    "signature": "0x6a09da0f3443937d85d1e9f14f54978ce2de107cd674c04f2a442e836ac1825757fdba076b2e84892287be3f67cab271182135cacfe8fa4073afeefe3af922081c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}