{
  "manageEntity": {
    "action": "Save",
    "entityId": "2059704284",
    "entityType": "Track",
    "nonce": "0x5f203ebe3f877a945c799b44d6784b7d223a4ac5a08795a973353990e14bba91",
    "signature": "0x9c48d597cb61eaf326be120c3d4ff22c3a081525ac8780ea7b269e99ce9b6ea17d084e3f857f49589d20a98847a19ffbb78c2e28ec4d1f888d2d94a321e02c8d1b",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}