{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121567",
    "entityType": "Track",
    "nonce": "0x883ef25424a40964be34f44759fb832306190bca7c3e65bff3a49158c31eff6a",
    "signature": "0x8d482663d5ff565a540d114ee3aae939030c4f1983c01e55328a2d50e723fbca5b17190660d0a5352dae10db68752c8a610187a994448a46a81f31c67c21c5881c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}