{
  "manageEntity": {
    "action": "Save",
    "entityId": "278304451",
    "entityType": "Track",
    "nonce": "0x70d7f96156e9f2baa29313ec90d052919f4b01873b6df905b324c133e8594128",
    "signature": "0xafde734eb383c14801d4a2e88e3112980f815855b9f570129f7bb18a7cbbc36a0af21aad56d0df9561258959d58e41c86cf099d5d6beba7023879c9732ba77e41b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}