{
  "manageEntity": {
    "action": "Save",
    "entityId": "1810724630",
    "entityType": "Track",
    "nonce": "0x1e34f4d146fec53b4d6bb18f60f434d99385a1b5eb6cad0ac8ab84a5520d468a",
    "signature": "0x28410cd60a727bb484c09ca083ec98a52b5bc7764766d8d09bd93f0408c1a70a7a4d5d3b8716ac7db074ab9aa5e45ea63613ac3c1b2ad6d1358d919dc16620ad1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}