{
  "manageEntity": {
    "action": "Save",
    "entityId": "1262780521",
    "entityType": "Track",
    "nonce": "0x45e6f5765ccb44722ccd8f842dc7b7108c632524195118dec9fec1a3f4e3f838",
    "signature": "0xa9a30dca5062be6ca8940f160d20b8b4a05082a5747006bf33ab2c9e56bb7a0e64c15253f480483706cd56236f63a75ccb0c18d356097fc4663895bb5654d9a31c",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}