{
  "manageEntity": {
    "action": "Save",
    "entityId": "600624177",
    "entityType": "Track",
    "nonce": "0xcc0f4e66594e61afda03b221fdc543e71e0fabd0c2d7c51ab1fe2c0f30d06910",
    "signature": "0x9c10c768ae689f1aa55b21eddc0a0c2135173167b8cd57c3573e190fd9ea8ae33b7e44aae4c961bba328fa91e9a26f95074099a7858fcf5e0f9de14152b16e621c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}