{
  "manageEntity": {
    "action": "Save",
    "entityId": "318223790",
    "entityType": "Track",
    "nonce": "0x07bd39fa8c5fe958b74cd3999de782fd7f809258439f88d5a3b406c2723c3378",
    "signature": "0x2ab602c9c090b74249c837230544ce85338e913158bceddaa6c1f313c2462c6f1b9df1c383abf18a5780e22ece869b1f64e3263ec107013cbc2524ecc0c930fa1c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}