{
  "manageEntity": {
    "action": "Save",
    "entityId": "1256988237",
    "entityType": "Track",
    "nonce": "0x8a0f9ed6aded4db3ba10c37ec0b9bfe1d3a8fbd8640aa6937a6f0ba6faff86b5",
    "signature": "0xff42a3209854fb02b79cf08fa72f5228547aecebe3b74df49abfcfeae93c9d9703958e8b53dc6e3677f2b09e84a9de7d5003bdbb008825841f96dede5098880a1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}