{
  "manageEntity": {
    "action": "Save",
    "entityId": "1611574589",
    "entityType": "Track",
    "nonce": "0xd2d0c94472709141fd0bc3943c82c11244790f5b862b4c162113d77e9e3d2a75",
    "signature": "0xc17cf2be73a1526cb1dd1873b83e383ea974641058f786482c25d0829d3a1eb83a8c00508b3956c0ba868e0bf52a376382b59f78809d7ef8bd7f4393eb35f4541c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}