{
  "manageEntity": {
    "action": "Save",
    "entityId": "1905177054",
    "entityType": "Track",
    "nonce": "0xf678a68bf25ccdf9f864df1cdcf241faf64c0e7a2e4220605508daa8d9bd0d94",
    "signature": "0x37a272d6f269c2c747b21032f6465d93b07aa34a318b443f2147bb4158374ead63a5ecc2afbd70152d03be3e6c971fc4015a81d9ada6171faa0a68577daaafa81b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}