{
  "manageEntity": {
    "action": "Save",
    "entityId": "1635413147",
    "entityType": "Track",
    "nonce": "0x1a5c9bfb7f2fc4c3731dcf62f0b5da95ddacae81d1aa3bba88b62ad3e21f0580",
    "signature": "0xe17cae2dc2235a13e33ae51736ed9ae96f153e58699350bb0e78a8cc019e478449778242af5f6b1a7ef9335272f93646b5fd1ee2342371ed3c2233f4b97ddfb11b",
    "signer": "0xd14727622fa26ECD6Ad72cADB6b96823f5fb65DD",
    "userId": "173494086"
  }
}