{
  "manageEntity": {
    "action": "Save",
    "entityId": "176467",
    "entityType": "Track",
    "nonce": "0x2fb1a67c82ac20d8f24e3818e7ac4d5fc55f39d65928aac0d455f423af7ee81a",
    "signature": "0xa711b18aed65228a7af44775922e30de8492384883c6ce0a8a18243de35fb68021a164a87aea16c923164c8f8412c201f27445bf4ca1c34253ca542f74123f7b1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}