{
  "manageEntity": {
    "action": "Save",
    "entityId": "771205939",
    "entityType": "Track",
    "nonce": "0x9e2ac911fee4648c43988ccec5421218f98b276d6ae787ae8463ba8df113ae86",
    "signature": "0xe519de200ffda7736cc6770beaba4d8bea81cffb0beb720e53d76649383c91650a1502bd06a1c37049e26dfb48c6e76e7b72e8c8f3357a81e13bff5820752fd21c",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}