{
  "manageEntity": {
    "action": "Save",
    "entityId": "1614439438",
    "entityType": "Track",
    "nonce": "0xe6527d3c2c97a9927bcf32aaa61c46619ad31c01dcb223330c5c2f404d3e042d",
    "signature": "0xc017f1a662048063b70eeb2bf57c1f48dfd020f6dc9cb6ab125f30b7a08d451c451c721f4f1aa01f6e6815aff76f9af94aa41682d54914a3e60cda89a70e8b611b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}