{
  "manageEntity": {
    "action": "Save",
    "entityId": "1418270820",
    "entityType": "Track",
    "nonce": "0x1f91c410f49f89a2ff5607be0b6d5aa72ba0dcb49424dcbd9aa9140a73d47a21",
    "signature": "0x084c36ce9f498ba20fdbfa5c2f29af9912c2bdd67bc572abb08aa2d76bd4f3cd1f93f556f97a96ecb2fa53b2002d54d558cdbf1bf35a9e4e56cb2603989087071b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}