{
  "manageEntity": {
    "action": "Save",
    "entityId": "847838146",
    "entityType": "Track",
    "nonce": "0x2003abec116f9b029d917ccf8c5f40c69307a2a31caab27fe769b679d960af32",
    "signature": "0xec8725b331cabc9f9b3eb77eec04bdea95a71330eb9ecd1e298d4cf8124506f7194d2b04ed37a50eefa227614acc8f9417c11e62282e3a17fd138fa59f6195901c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}