{
  "manageEntity": {
    "action": "Save",
    "entityId": "516621105",
    "entityType": "Track",
    "nonce": "0xbbc53192377b8dd7a7732b8a76c6142c36735dc1a10c6425ea175347cd6209fd",
    "signature": "0x2f0262b099cb97644c660ce7d3b58de3bf98ed82b66ba945c9d1ba8c637ecd4006371503de3edf9c5c34a38cbe60430bc2aff851e7937f2ef7468efa167e60a01c",
    "signer": "0x05aba01c97C4F182D989670622abE9c797782dD2",
    "userId": "508263176"
  }
}