{
  "manageEntity": {
    "action": "Save",
    "entityId": "1210033479",
    "entityType": "Track",
    "nonce": "0x3b7bc72d957b37f2d3a9dc5b7aacc8e28ebcd30a785ee2102cda77e5593bbe98",
    "signature": "0x3b8d2c8c04177680ad6826f28d73799f4c381fd68e8cb038ec81ce4dc783a9bd19a5eeae9d8d27f13d5891d6c0fd1abc09755862b3aa8178a0be7870719924c51c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}