{
  "manageEntity": {
    "action": "Save",
    "entityId": "2113594061",
    "entityType": "Track",
    "nonce": "0x64001d606ec274c9a795ff89d6cef4a2b71f409d58e3f4869c25e88abc178523",
    "signature": "0x07ec916ba98424c23a0f2576da81aa2f898edb8665c9d7f6f10423905bf509fc08726b5df17c841eff97f6e1b5e5e909bc1bb0fd7155670417daea9ccd9441e21c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}