{
  "manageEntity": {
    "action": "Save",
    "entityId": "368337",
    "entityType": "Track",
    "nonce": "0x979e169c695e30fb278447650e370e1678afa5e36520bd36f7421fcf0309df75",
    "signature": "0x2c799f94abc00a59ae2d64da7eed814ad2d2fbd55ac8ac2b157f614dc2abbd45130f2abeb07266b59d51d14b5eecec8f44845151236a3224cf8654b307b902ee1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}