{
  "manageEntity": {
    "action": "Save",
    "entityId": "1052282",
    "entityType": "Track",
    "nonce": "0x10221582fa565f906c07beb7e05d0a0ab8a345d67f878718960463ac683a8657",
    "signature": "0xc2457822673649bfc1f2448c17368759126f60f68d81a059a09fa798b8fa44915b6f7fb6bfd7c853b013fd5f69fefd7caf16d5f36e436982509362f40ca9719f1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}