{
  "manageEntity": {
    "action": "Save",
    "entityId": "1089907",
    "entityType": "Track",
    "nonce": "0x55da2f7bd6c4f29f585c6b58cd0ae8abaed63b7aecc3490225b78fb8942c186d",
    "signature": "0x8d1dc5889dae193d562617878c4015d9ea43127f0b6846c45f516ab07e94e77953198d531a7b89ea3b519116d99c8e15faa1cce7b420cc0ce9a61963089b506a1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}