{
  "manageEntity": {
    "action": "Save",
    "entityId": "355361232",
    "entityType": "Track",
    "nonce": "0x64fb111acaa571e538a8546633de5e3ed31873d89577a7070983cf35884487bd",
    "signature": "0xd72c1d398664aeab6857e079da997d24b4631bab239d88326357a0a996c2931c2ff981ef08d787e372c1dbb9837c7a502f82b7743203009dc923ef25a4cead651b",
    "signer": "0x24EB8cdE5605b86b2ac2d2EF049f85BBe3B90E28",
    "userId": "993204852"
  }
}