{
  "manageEntity": {
    "action": "Save",
    "entityId": "1632966389",
    "entityType": "Track",
    "nonce": "0x8f9555d92025a3140f9df5e85f179916682a458f73d352adc05d878d03e4f189",
    "signature": "0x76492c7c26ab6bba82b5cbf324be7544ce95269fd1168b0c7cafd38e1bb72a7c43e2283cffb7cbf5ac1dc3c205b524b4f4b85321c0fe545fa5a6cc07f22b034e1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}