{
  "manageEntity": {
    "action": "Save",
    "entityId": "1905205450",
    "entityType": "Track",
    "nonce": "0x80c586efd342890206f3e274ba9a0f2e159a57ef3d7f297aeca793be3709016a",
    "signature": "0x419827deb9e8b9fc4e99f2611981e58299d6b3e016bc369ccdc380c35ae3ba0a61712eb883e61f68250dc2b75e373446d17e83329c43524e39128ee5e92e3e2d1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}