{
  "manageEntity": {
    "action": "Save",
    "entityId": "152301113",
    "entityType": "Track",
    "nonce": "0xd13d58155f4722aabc25d1ff7c8aedf5b632685d2dde5693f81617fcb876ea83",
    "signature": "0xd757a7ecd66d69137ea9bbe2e31c4b9c6f9ac653c73381323d6fb6d769af84531755b7210601a45fcd44f5ad9ad135ac5e4b02d6d5cef2b5b4b6ac7cb07e85471b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}