{
  "manageEntity": {
    "action": "Save",
    "entityId": "969945645",
    "entityType": "Track",
    "nonce": "0xfe3eb25717d1e9549de66fc3f51be490e6c5e7a4f9a7d0da1fc73025f9a5065c",
    "signature": "0x91442900ea17fb1282e6809acbc88ac304df2b06df024c0f3b7acd90c63f1ef953f270575cbd50216ea8084bc3079133d513f02a907509576deef83529761a851c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}