{
  "manageEntity": {
    "action": "Save",
    "entityId": "252741506",
    "entityType": "Track",
    "nonce": "0xc207cdd280f7715831261c3df6f3e170b9915e6402d59b53565dd382d48ce558",
    "signature": "0x3a9492279bb3e8ee4038a7209ee483e8273224109115e2a687edb1b6ade45e6f0d0557e5794e334065895489fe796a8b5da26c4ea63c0decfd58abb9822d6b351b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}