{
  "manageEntity": {
    "action": "Save",
    "entityId": "1462331212",
    "entityType": "Track",
    "nonce": "0xb0404f6cb2841266b913f5a56668d9cc2854ca79584b00ff932a8390dbf8a946",
    "signature": "0x1c72fc6a11f232becab121d3e5c489af5c276f15854f45f3fca037fbf329a5c91340edc6172034f7131d587d736feb3926840fd28fa1d8a9081d85aa1b2b72351c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}