{
  "manageEntity": {
    "action": "Save",
    "entityId": "1567859692",
    "entityType": "Track",
    "nonce": "0xbd348c241c33e39d980890594e57e5f6fa780604430f6cff27722296e2cb7562",
    "signature": "0xb0f13e392cd145e713d5e27c63836ba86a40f955e7ffcfab6c630efc64f2624f2c41d5443f2c98d70f7e185ea9f3e674bd10366d73bacc17f4a207cb40e1c31f1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}