{
  "manageEntity": {
    "action": "Save",
    "entityId": "274703490",
    "entityType": "Track",
    "nonce": "0x8ed8f038eda9b20246ba2cb53ead74f67cc9f7336498a2efd6790a70d1476a27",
    "signature": "0xc6e0ea65598bd4d844faa85320ca1cf6bc02ce37588ebd6f7f346a8c3d21a6f84c2abf5dc8e2eafd77a6e64234bfd393a84a88e656a2670198b703ac6585256f1b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}