{
  "manageEntity": {
    "action": "Save",
    "entityId": "269090046",
    "entityType": "Track",
    "nonce": "0x7eafbb99280e9c31f7885fcf4107b4b83514404c63699aba4faba319775b4539",
    "signature": "0xf98428b335ce774277531352d4bfa43452968bf67135ca4ce752b077df63b6282bc66b9d0c50372a58615448bfe095573869a4458fd60ed271e3657dffeeb03e1b",
    "signer": "0x4a57e2DeD165f5711bbB2bFF6253838BcFee1928",
    "userId": "268361684"
  }
}