{
  "manageEntity": {
    "action": "Save",
    "entityId": "1709626672",
    "entityType": "Track",
    "nonce": "0x2da84c511906746c6bb6169a08590cedd38570531446a50e351bbd4def985dda",
    "signature": "0x3043c6e46dcd53775295a2a3b0d25b5cdba834ab385633a6cdf13c679928ac1937e3254885a7f75023a48d9691ab2847e26fec9a447f21edeb1969ff6090cbd51c",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}