{
  "manageEntity": {
    "action": "Save",
    "entityId": "38181198",
    "entityType": "Track",
    "nonce": "0xc3961f4aaa31c161f226f80fcb10e38eb0ae8ddfab7ac90f59d5b52b5ff20a61",
    "signature": "0xb565e5c1d2e163432c52ee610a8554d67a5c1dfdcb1006681274050104ff29706fa47d13a3423df25109b8a6b4effb7fa2439c897547bbe0649c6bc46c9d6f8a1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}