{
  "manageEntity": {
    "action": "Save",
    "entityId": "1419398732",
    "entityType": "Track",
    "nonce": "0xe6083a94c1445d86484cb961162b7afef0127036b9f4c15af7ab7cf80969929f",
    "signature": "0x81d8e291b704583dfc2eda6c963c8d0b271252b7fa9ae5f934311d7228a6d5171ae7b7da6604e3bd3081d7839dc752cfc336462bfe19d8545a563309f8e8f7aa1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}