{
  "manageEntity": {
    "action": "Save",
    "entityId": "295565371",
    "entityType": "Track",
    "nonce": "0x125d4d9fa47402602fe103a48411681454bdcd62b8fc71577087f7b3bf7af318",
    "signature": "0x698fd1f55057ccca0074124237ab02f07c503f8e6cdbd8c7645fdc7a86a3bbc321c80796965b6f1648d50210b50049d7dcf01815c56dcb5f9a3c7d7a863e630b1c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}