{
  "manageEntity": {
    "action": "Save",
    "entityId": "28298021",
    "entityType": "Track",
    "nonce": "0x3ebe3b39c16ef809f3c772cb80b2b52785cc808b121a6e24d693d559e4cec110",
    "signature": "0x0c13a4a3eccfcedc0bb82d74607afca3677fba9b1b15bcd83f2629f97e550bac66257c2eb84a4bc4365c45f21d628ee0f8fdc58d7b57385c2d285a3c93c6c3371b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}