{
  "manageEntity": {
    "action": "Save",
    "entityId": "319389",
    "entityType": "Track",
    "nonce": "0x9cdc9fa124b5c9e654e9dee1deb4e4e4d756b4276abe9cbf51c15988b188d654",
    "signature": "0xbbb646f09dfa4c62e31257c5593dbe7b2fb111b39b35b1a0cba85697ab2e58516ce3edfdb9a259646c7aa012db080ad949591498b4edc6f6c7432f3fef924f071c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}