{
  "manageEntity": {
    "action": "Save",
    "entityId": "1141868327",
    "entityType": "Track",
    "nonce": "0x9df2ba98498198ceb40a7811d77759ad2550a526eec60172e54c3901c774fe01",
    "signature": "0xaacdb17006267e1eee5c7766b81b0260e7745a110de2d51ccbf78fb327534a7678e55af981a335ea4cb5766f0840e82a83d1192cbc203c2c87653ca38d67b6c51b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}