{
  "manageEntity": {
    "action": "Save",
    "entityId": "1728441084",
    "entityType": "Track",
    "nonce": "0xa327f86002970b47d3133e4d2b5dd6bf80290d03b9e742876317048798087ba7",
    "signature": "0x347fb57bd7b0f3d550b879b185ecd8d66eea17aa14c714cb1e559cf66e8b0b165b125f76a52e8592d62a8b80901a706fc195a619af7676d5c263eefa03082b9e1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}