{
  "manageEntity": {
    "action": "Save",
    "entityId": "1488839202",
    "entityType": "Track",
    "nonce": "0x5b93dd83b7579a7c3219d13cdf2426ddba40f262db83da42cd5956e984bb9f37",
    "signature": "0x7bae3cc00f89739a3f8f23ce95294613767cd3ff6161821616378909af7f05244ed95f2eb84d31f9d8c6ff1ee56559df7f0318cc2527b2fbb338fb83270995fd1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}