{
  "manageEntity": {
    "action": "Save",
    "entityId": "1622138017",
    "entityType": "Track",
    "nonce": "0xf67e16fab0ab6c2b75d866acac6d28fd6bed4b28bc9f8104f178154a19037a3c",
    "signature": "0x58c3d974f8e5126c8551675335f4a1e2a09ef63e5b0ce1eb5372f486c457c7472b3121e27cf34edc80780905d87f355c93716725977c3efd84d9786ca19975ae1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}