{
  "manageEntity": {
    "action": "Save",
    "entityId": "128530448",
    "entityType": "Track",
    "nonce": "0xcf0d54545a147ccea40b8b505e7d83449524e9dca24e8f63645910a870c9a33e",
    "signature": "0x1be6e2739253dd1077c89515ec25119f5076309be17aa57182305b28ad46bf0a091d888b27d17219f0a7316c6ea5810a0c7daeae0a0ca147c288339890825f071c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}