{
  "manageEntity": {
    "action": "Save",
    "entityId": "1735674787",
    "entityType": "Track",
    "nonce": "0x27bf929b87c3c69e502aa28820cd073848321704f8742a4bd8c5e6b23e426074",
    "signature": "0xd2d930f330d72c0a684b730be95f00362be22e56e542fd86584219e30917f77c744f24d5504f8591bd223d6d6a0931e686113036ae14cd841b03e62f05b835c21c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}