{
  "manageEntity": {
    "action": "Save",
    "entityId": "1674528369",
    "entityType": "Track",
    "nonce": "0x8691bff964aba07322bde2723f96ee20a91702e73232d294eb3722ea87df8257",
    "signature": "0xcdee3df3814f458abeb53c0a8b406132f94441249fbdf129d9a7f3cf4ccc3e3724d36e3e0a0804153eeae89a3c44efaf0fc36403db598dc3988f922f53f81af71b",
    "signer": "0x879AB09f06df488AF471eeBA6489678312560024",
    "userId": "903958768"
  }
}