{
  "manageEntity": {
    "action": "Save",
    "entityId": "250020",
    "entityType": "Track",
    "nonce": "0xd1e9392097d0c57f61d38228dec3148a0edbf8abd74361561c319beeee7b46f4",
    "signature": "0x2a2f24c452f7778f98e7eeb8191d5ea5c82f8fef72dfc4fbee1da48c12c976d959a88fd9eff9ae904e5e0e4535f991a4b6e45328a0fd5729997a728016e7e2f81b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}