{
  "manageEntity": {
    "action": "Save",
    "entityId": "1457017351",
    "entityType": "Track",
    "nonce": "0x7766055ec8a355df5190e8f2120db02913e075a5c8092a7ab10d3a2e37b64251",
    "signature": "0x682a2b2ebe2d34932008be7c255952bbfcff66e5c0a1ff2be385e8e997a3337574b9c06e4be19e3f20ed842539c1dabec760245b7ab5a4a80a8bea319eb3d44a1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}