{
  "manageEntity": {
    "action": "Save",
    "entityId": "715505662",
    "entityType": "Track",
    "nonce": "0xdf30195c755d75b5707970caa8103470e87bea59a592c1f55955ddac9dcbe892",
    "signature": "0x0bf4cbe5d1d6f736f0acc69a7ed794fcc41c2e7adb30ba1e57f8ce76ce2eca3413cfca18c5e32afc60e9b1755e8d5fc15512dda2393c776c7f265e73ef828c931b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}