{
  "manageEntity": {
    "action": "Save",
    "entityId": "1719653446",
    "entityType": "Track",
    "nonce": "0x0ce2de06727a19795f405b4b555cfddb063fb022477c726a32b6dccd63def258",
    "signature": "0x42f281ebf6658b833295c28bbf25ecf69492415a32eb5fa6dab9e0dd17ed4e9c6c5ebc92ad9470c1bcbf1741d76f16ad8f342f8e44c8f9c05aa02c39f4a4bc321b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}