{
  "manageEntity": {
    "action": "Save",
    "entityId": "227661983",
    "entityType": "Track",
    "nonce": "0xb6886a1eb739ae19558b1aee499bfefcba58795e13388111503ef2c0647e81ee",
    "signature": "0xfaf9a0b171ebf1928465a857b739a0d5600361596e84ab977ca8bd08cbc782d5725eb435bcea55321a041bf566ee70f2daf23112b9c2351517d097a62133123d1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}