{
  "manageEntity": {
    "action": "Save",
    "entityId": "2023228794",
    "entityType": "Track",
    "nonce": "0x57f317db07ba19e74f231c0f5e1a0ac1a1e65922a15b01c037b819309b1ac211",
    "signature": "0xcab43ca1d79486a45e683402d03276ebf11e3f37bd4b041c4f5073370251c3bf26c018eb66595b66a92dfe9c9f6854b81f830a9f4f52196394750882d1345ade1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}