{
  "manageEntity": {
    "action": "Save",
    "entityId": "1705943250",
    "entityType": "Track",
    "nonce": "0xdb335e16a44ba232a374db49ca446111477744b877294b830a31f5d87b92d7ad",
    "signature": "0xf03b8988706a01576666b02cb7cc501b5411f75b27a654940c8f2b24ff874bd754fb249bacb3e385367f181864c7f33ffd563781a662a72bd9c77e67bcf35c7c1c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}