{
  "manageEntity": {
    "action": "Save",
    "entityId": "293561562",
    "entityType": "Track",
    "nonce": "0x8470e230a09a86c7138ced42cd3ef64ef4e10194a8fcad0d7990cb41e806ae31",
    "signature": "0x70f4b672f1485be0c5431cb01363bf354ce4900355741b36055179128809aba6784796ad381955522955ec9855179d75a5daeb4eb378c1529a7cd81630386ebc1b",
    "signer": "0xF886D10824DDa867eb89ACd60EAF44D01F1B0E8f",
    "userId": "381084983"
  }
}