{
  "manageEntity": {
    "action": "Save",
    "entityId": "930253648",
    "entityType": "Track",
    "nonce": "0x9733e59672ea0bfb35d350fe92f1a27e8c24b09f7a327b36103c4979cdf7e32a",
    "signature": "0xeafde54b3cbab126e8003761053b0410476248fb820316db231b860766a60e7b682e59259a9009e0a6a3405815980184e60eadbc72bb8abcbc0f0f936201462b1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}