{
  "manageEntity": {
    "action": "Save",
    "entityId": "589620035",
    "entityType": "Track",
    "nonce": "0xd1b826139483ed9acbb3f90aaa022c716eaa3d7346081aeea2c7068c3e4f7312",
    "signature": "0x230a7eed325160c7673cdaefd3fc5f6c8bf59d5eaaa7a2cf0952ae7be1533ab1585740471e7face23c5716b4e2aa0c3bb2b407eac4ec18d4aa7a8d47e2d70bb51c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}