{
  "manageEntity": {
    "action": "Save",
    "entityId": "62406",
    "entityType": "Track",
    "nonce": "0xd228c973978d24d13d985de3ceb9e17988fc77780c7b369e9e9163a0c2abf7f8",
    "signature": "0x4bdb647ee7ff977c74938fe8f758f936662cce3b21e5e4afc79268130929afc55da80ee6506a113a6d846cc1b4d071503120aec25ae813317548bbb33306eab41c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}