{
  "manageEntity": {
    "action": "Save",
    "entityId": "853006631",
    "entityType": "Track",
    "nonce": "0x199f2874902d4899879b81746a8b0cb1eccaa83b39fd372f8595491b44eef30a",
    "signature": "0x85c75b4970528be2b18c3e27d8176a1c7d8a98bad059d320fc8323c7888b47b81fc72df5c432f2e47431053674d4c2b6106b244cd5c512d6443ea4609bf62fbf1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}