{
  "manageEntity": {
    "action": "Save",
    "entityId": "1685925090",
    "entityType": "Track",
    "nonce": "0xd693e5e566c2097d81012f5d3f109559f269c9bb6fbafd2ee5e814e500eac683",
    "signature": "0x137cd2a0a45fa18384b037e04cc64df68bd6154ddde537d7ba2fe87868ab93bb36fc123958d0334c1a4621fa09b3e4db847f85962ff02ece3c35ac990f3391581c",
    "signer": "0xb51B50C9b7d88C66d31539161F4BA9Dd72a17dF5",
    "userId": "465531556"
  }
}