{
  "manageEntity": {
    "action": "Save",
    "entityId": "1606499163",
    "entityType": "Track",
    "nonce": "0xbe3e681da27bc3d8a99888e12723ecabdbd97a9a1c4cf429c9a234d087c93fee",
    "signature": "0x95f0681b95a333e8ed8c6e3be94fe9398450ca118b56e63e07da305d8ba1f7d912379a313cd1da8e19aeb19b72ba023a3e038cb840eca19ac048da4d694c7e5f1c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}