{
  "manageEntity": {
    "action": "Save",
    "entityId": "274578129",
    "entityType": "Track",
    "nonce": "0xf2be9abaf5e59cef2064538c544cf9e36a92f4f8d500cff570aff570b20406e8",
    "signature": "0x2308f4a2be7f1ea277153092802d51d4fdeae1f450c88f9e44ae8be7da6cfca1617e143a09a54ad2f62e99e508d25c13de55cbd75d040f98003d4ff1564d9f2a1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}