{
  "manageEntity": {
    "action": "Save",
    "entityId": "265449",
    "entityType": "Track",
    "nonce": "0x04ea4aadea5bfd3d1ead3154bb5a60bf2ba5eec6d3827695f1e9d7f6623271ad",
    "signature": "0xe6a4021a0dae47e337b7e1487e8df0eb8dd59bd7cabdfb3a820096514eccedc64819389bdb39bca5fa8d6d753e800d01c28a5e8516af1aa8ea407983404066e81b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}