{
  "manageEntity": {
    "action": "Save",
    "entityId": "1104727",
    "entityType": "Track",
    "nonce": "0x5e0b5d025ef8e47759ce017207c19a9a7962f022e431c1b40836ae311a088c97",
    "signature": "0xbdbdbd1258766f3ec5e7cab1a8f3086fd3b0ae521f39edc7ff2ab3410377b0ff7e69bd847d68dc28b50a8e76cbed163a7fa43e5f094aa8720d842c896cfffd0a1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}