{
  "manageEntity": {
    "action": "Save",
    "entityId": "1444169447",
    "entityType": "Track",
    "nonce": "0xa6e8ef72c016d6f16ab6837e36ca8d081b00b6269b2ad733f4a86a7b0c6b1eaf",
    "signature": "0xea54b31002e9904c60faa87e496067e569057b46fc5064408f576a6a60d39cc0095865a3cfe75768f32c04921098ac1a354ad469751273c47c15636e984053051c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}