{
  "manageEntity": {
    "action": "Save",
    "entityId": "1685545488",
    "entityType": "Track",
    "nonce": "0x1722de090434f1f4e526ccc2485019011af0a2cac75f58752cadfadc83e3de4b",
    "signature": "0xbc66411f994ebf8f6915448aac24e617f7abc1322f29ed48071e4cabd07e3d89373af609aaa3775ae54ba7cb8ffc081c6d0a3473fe1442729058cfc3ee2f53d71b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}