{
  "manageEntity": {
    "action": "Save",
    "entityId": "1980035270",
    "entityType": "Track",
    "nonce": "0x360c07583299dee707d9b4904fe0e1edd8e30aa8d8faf444c3980e57abf7b7a2",
    "signature": "0x50ef08dc84ffc54ab33703efd915a66eeefd125fa4001ee27eab0dc9e6a4ad0807336eb8786623fd7961463bb1727f352b46b59251109b52e91a2ef6743210c71c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}