{
  "manageEntity": {
    "action": "Save",
    "entityId": "1212622323",
    "entityType": "Track",
    "nonce": "0x622a80043f8fb78909f16ccfb54b49e3126a0147b4192f6d3e0fda640dd14920",
    "signature": "0x73fdb0f06218238478607edb91620590cbc6ddc55abb1ee4e5835c96bd73ec18452c186e096c45683ba44ec91bc2996e51761880545d53865fd43953fc7c96ac1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}