{
  "manageEntity": {
    "action": "Save",
    "entityId": "2147160279",
    "entityType": "Track",
    "nonce": "0x6ab627f23a1709167508df033ba001a8973473a5c9143f89dfcc68fc8244fb4a",
    "signature": "0x3521203148b02cde7258b78ad5f941df54aa37d427b3ed37ef5a3912a98278882703ecbf17007804102f69933c9bed844e85c688a61aadbb29470ba70669e4c31c",
    "signer": "0xF886D10824DDa867eb89ACd60EAF44D01F1B0E8f",
    "userId": "381084983"
  }
}