{
  "manageEntity": {
    "action": "Save",
    "entityId": "102453052",
    "entityType": "Track",
    "nonce": "0x838fc1b8ab1b3e0df3b6d35afadb9ac3c16a6cc0042bc2d0016a3caabac032c1",
    "signature": "0x123c27e83aae662c52b264dcbb9411aadc012f78adc92e9f8528db8965314ad567fcad7a3929c234c399f3aa0b65570f53826621765cd7d4cfc4c5f42a0283a81b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}