{
  "manageEntity": {
    "action": "Save",
    "entityId": "1678541368",
    "entityType": "Track",
    "nonce": "0xa17b9ffb4941959d1a09d7f7fbfcdc0c9873f4bd2e0691c3e9f842509cf86a2d",
    "signature": "0xaeca896f51f66974cafdb16a1286673fb6f2b5b15933b9af1d8f24f041351b2e25e48d23214bda1102b29eaca88b1f63f15ed7eaa95af76ba070540ff19048611c",
    "signer": "0x1080460F21DCc82D7160d2C77DaAb22a92c4dD22",
    "userId": "162106877"
  }
}