{
  "manageEntity": {
    "action": "Save",
    "entityId": "385163954",
    "entityType": "Track",
    "nonce": "0x80ec32c098a6f7164ffdb805ad949d2ae684f128e97b4b27c8a507fc27e0b4c4",
    "signature": "0x017a8293e9ded22896cb0363baddb367728fb3fea097ec87428402b238058d4a1b081405acafe25e28ad272c43b2a34876fd50f33ad1c92b64bda1aa86e771191c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}