{
  "manageEntity": {
    "action": "Save",
    "entityId": "517105059",
    "entityType": "Track",
    "nonce": "1792393675326919342",
    "signature": "0x3b49ee06afc61f81481c28e8144f2b4a8153535e40ea49e86a5728806020e49271c5cce8399f527abf08242f9f7c3ed9a2e5c4dabad9b637037a0176ef9244151b",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}