{
  "manageEntity": {
    "action": "Save",
    "entityId": "812392872",
    "entityType": "Track",
    "nonce": "0xc6e9ff8033654f67a9ff7b65838fc8e0c40cd688dec50d240ddf5c9e999af0ba",
    "signature": "0x119a8bcdd58f1bced80781524c7cac876a2dbed11a485c4a681c45cf440b7ffc2ba4b781a4b755784ac4e2e2858a50e0d6522d82ec1c3966eec475b52d953d9a1c",
    "signer": "0x3B1596C5eeCE626eCaf33b6A05ed3055E5f10049",
    "userId": "119255"
  }
}