{
  "manageEntity": {
    "action": "Save",
    "entityId": "1382102867",
    "entityType": "Track",
    "nonce": "0x0890888b468ef42c7249f94ac7ccd489acb2a0387b3f0addfed65d94ebb8251a",
    "signature": "0xfeea8d4840fbd07d1b40a8d23ba20b692daebcf5375f9ab026f25f825dd8183b0fa2d42c75027553255161b3994596798999e90f983f0d61112616e119b4c9a91c",
    "signer": "0xbAA633dfD19281ECC20a6b689F49CE8725d526Cc",
    "userId": "127651"
  }
}