{
  "manageEntity": {
    "action": "Save",
    "entityId": "1400279371",
    "entityType": "Track",
    "nonce": "0x3368b9c3ca72304e80748579bcb69afb0d9e7d66ac6f706f74f5ece31fcce58d",
    "signature": "0x32faa35efbd62fa603ad170a6bdf4fd71b4d44a7394a7ab6e7da1b919678fe0f115bd36fa755c99a351c07333ec187e7a88e91ea8228c7e4db763b3ec288f7dc1c",
    "signer": "0x92328BFDeD38C9a9De6E253A0CF5CB46A3B28611",
    "userId": "831117417"
  }
}