{
  "manageEntity": {
    "action": "Save",
    "entityId": "385094",
    "entityType": "Track",
    "nonce": "0xc7bad0ca75baa1121f3bcd3947650e4bf177d2d23b223d5b48564604e10d71c4",
    "signature": "0x88f853acd1e4f8f58dfe47d0326a2177402d634c5a5cebf6ee5cd79d9e91e01e3161f4d2a154d8615cc9526850465844b98e6edb69db17b54992e605073f25501c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}