{
  "manageEntity": {
    "action": "Save",
    "entityId": "1325728195",
    "entityType": "Track",
    "nonce": "0x0b99ac39077686c4f4b6aab2148328157103d69561a42fe303f823cd0a4cf0c3",
    "signature": "0xbac7df49458392bfd5fa99010b893b7af4e98874612760f75ab44053094548aa5492ddecbd94bde41c5968451b3a29e513378895674495aca676531dbd83ce6e1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}