{
  "manageEntity": {
    "action": "Save",
    "entityId": "265351187",
    "entityType": "Track",
    "nonce": "0xf8d55ef087b02e149aa8ac495083af7cf7b18bf8b68636d424b9837f5428417e",
    "signature": "0xfbddff26c19437bc4614a595b41381adbfb7cd03599cbc8b8319172ca7e5e51e67619f69f130ec4ef0df3458fe131c4350ced62b16b32395eb77ee88591b313f1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}